CN107352923A - Water-tight concrete and the method for preparing the section of jurisdiction for duct pieces of shield tunnel - Google Patents
Water-tight concrete and the method for preparing the section of jurisdiction for duct pieces of shield tunnel Download PDFInfo
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- CN107352923A CN107352923A CN201710731856.XA CN201710731856A CN107352923A CN 107352923 A CN107352923 A CN 107352923A CN 201710731856 A CN201710731856 A CN 201710731856A CN 107352923 A CN107352923 A CN 107352923A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of water-tight concrete for duct pieces of shield tunnel and the method for preparing the section of jurisdiction, including 355 415 parts of P.O42.5 cement；488 567 parts of sand；953 1212 parts；117 138 parts of water；35 55 parts of flyash；1.5 3.5 parts of methylene dimethyl sodium dinaphthalenesulfonate polymer；59 parts of Fanglun 1414；7 15 parts of swelling agent；37 parts of pitch.By above-mentioned setting, coarse-fine aggregate possesses good grain composition, can reduce the gap between coarse-fine aggregate, is easy to improve the impermeability of concrete；Methylene dimethyl sodium dinaphthalenesulfonate polymer can reduce water consumption, and swelling agent has compensation function to concrete shrinkage, improve the crack resistance of concrete, can reduce voidage；Again by the combination of Fanglun 1414 and concrete, by the anti-permeability performance of gap filling, further reinforcement concrete.
Description
Technical field
The present invention relates to technical field of concrete preparation, more particularly to a kind of water-tight concrete for duct pieces of shield tunnel
And the method for preparing the section of jurisdiction.
Background technology
Construction technology now so that particularly rapid and important, the even local economy of Urban Rail Transit Development
The construction of important indicator, wherein subway, will be prefabricated by shield machine construction now mostly using more ripe shield technique
The assembled shaping of finished product concrete pipe sheet, so as to form the support of the innermost layer of subway tunnel and barrier, carry resistance soil layer pressure
Power, groundwater pressure and some special loads effect, be shield tunnel construction main mounting structure, so section of jurisdiction is each
Item quality directly influences the overall quality of engineering.
The Prefabrication of section of jurisdiction is typically using high binder materials, low water binder ratio, the concrete material of low slump, so as to protect
Demonstrate,prove the high intensity of section of jurisdiction and certain impermeability.Application publication number is CN106431063A Chinese patent document《One kind is used for
The rush of metro shield section of jurisdiction coagulates Early-strength polycarboxylate superplasticizer》In disclose it is a kind of added with special water reducer subway pipe
Piece, according to the compounding mechanism of concrete admixture, propose based on water reducing type, the solidifying early-strength polycarboxylic acids mother liquor of rush, to be aided with tool
There are the components such as the air entraining agent of excellent compatibility, defoamer, coagulant, corrosion inhibitor, preservative, blended, stirring forms uniform
Solution, you can so that section of jurisdiction obtains suitable setting time and early strength.
But because pipe-plate lining structure is the permanent the lining steps of shield tunnel, not only need to meet in construction
Early strength is in order to transport, install, it is also contemplated that anti-permeability performance of the pipe-plate lining structure under long-term use of state, because pipe
It is provided with substantial amounts of steel bar stress, built-in fitting, preformed hole and ring interannular connecting bolt in piece, therefore section of jurisdiction itself concrete
Anti-permeability performance directly influences the quality and service life of section of jurisdiction, particularly important for the normal use of whole shield tunnel.
The content of the invention
In view of the deficienciess of the prior art, the purpose of the present invention one is that providing one kind is used for prefabricated pipe section for shield tunnel
Impervious concrete, enable to possess good anti-permeability performance using prefabricated pipe section made of the concrete.
To achieve the above object, the invention provides following technical scheme：It is a kind of to be mixed for the impervious of duct pieces of shield tunnel
Solidifying soil, including,
P.O42.5 cement 355-415 parts；
Sand 488-567 parts；
Stone 953-1212 parts；
Water 117-138 parts；
Flyash 35-55 parts；
Methylene dimethyl sodium dinaphthalenesulfonate polymer 1.5-3.5 parts；
Fanglun 1414's 5-9 parts；
Swelling agent 7-15 parts；
Pitch 3-7 parts.
Pass through above-mentioned technical proposal, coarse-fine aggregate possess good grain composition, between can reducing between coarse-fine aggregate
Gap, so as to improve the impermeability of concrete；Methylene dimethyl sodium dinaphthalenesulfonate polymer can reduce hydrated cementitious thermal spike
Cement granules are had peptizaiton by value, can improve its workability, unit consumption of water are reduced, so as to reduce in concrete after moisture
Phase evaporates the void content to be formed, and reduces void ratio, further increases the anti-permeability performance of concrete；And swelling agent is to coagulation simultaneously
Soil, which shrinks, compensation function, and the structure of densification can be formed in inside concrete, and the crack resistance reduction for not only improving concrete is split
The generation of seam, it can also reduce the hole of inside；Fanglun 1414 is added in concrete base-material again, through stirring
After mixing, form fibre single thread or network structure fully opens, formed in inside concrete a kind of disorderly very effective to support system, energy
Control concrete and cement mortar early stage plastic shrinkage and sedimentation crackle, greatly improve the anti-permeability performance of concrete；Together
When, the polymer chain of Fanglun 1414 is in extended configuration rather than folded state, forms club shaped structure, and
Because its strand is linear structure so that Fanglun 1414 can effectively utilize space and possess height
The charging efficiency of effect, many polymer can be accommodated in unit volume, by the dilatant that is generated in swelling agent in coagulation
Caused compression in soil, further Fanglun 1414 is compressed and is filled in the hole of concrete
In, so as to greatly reduce the porosity of concrete, further improve the seepage-resistant grade of concrete.
More preferably, including following components by weight percent：
P.O42.5 cement 380-400 parts；
Sand 500-520 parts；
Stone 1000-1200 parts；
Water 120-128 parts；
Flyash 40-45 parts；
Methylene dimethyl sodium dinaphthalenesulfonate polymer 2-3.5 parts；
Fanglun 1414's 7-9 parts；
Swelling agent 12-15 parts；
Pitch 3-7 parts；
Swelling agent is at least one of anhydrous slufuric acid aluminium, Potassium aluminum sulfate dodecahydrate.
Using above-mentioned technical proposal, by component cooperation, manufactured section of jurisdiction concrete, which possesses, more preferable anti-permeability performance,
And also possesses more preferable compression strength and workability simultaneously.
More preferably include the component of following parts by weight：
P.O42.5 cement 380-400 parts；
Sand 500-520 parts；
Stone 1000-1200 parts；
Water 120-128 parts；
Flyash 40-45 parts；
Methylene dimethyl sodium dinaphthalenesulfonate polymer 2-3.5 parts；
Fanglun 1414's 7-9 parts；
Swelling agent 12-15 parts；
Pitch 3-7 parts；
It is by ratio of weight and the number of copies 2.5-4 that swelling agent, which is,:1.5-2 anhydrous slufuric acid aluminium, Potassium aluminum sulfate dodecahydrate.
Above-mentioned technical proposal is used, it has been investigated that anhydrous slufuric acid aluminium can react raw early stage concrete is stirred and is molded
Hyrate is crystallized into substantial amounts of dilatancy, and dilatancy crystallization hyrate can produce compression because it is in inside concrete,
It can be substantially balanced out tension caused by concrete shrinkage, so as to reduce Shrinkage Cracking of Concrete；Further concrete
When being molded mid-term, cement-hydrate reacts to form expansile entringite in Potassium aluminum sulfate dodecahydrate concrete, by concrete
The pore filling in portion, reduce porosity, improve anti-permeability performance.
Further preferably, the slag powders that parts by weight are 22-31 parts are also included；The silica flour of 6-9 parts.
Using above-mentioned technical proposal, slag powders and silica flour can replace part of cement, reduce cement consumption, reduce cement
The heat of hydration, it can also make it that coarse-fine aggregate in concrete and binder materials are scattered more uniform, it is possible to increase the stream of concrete
Dynamic property, under the premise of the ratio of mud is less, keeps finished product concrete to possess good workability and slump retaining, be easy to construction to pour
Build.
Further preferably, the clay content of sand is 1.2%-1.5%, modulus of fineness 2.3-2.8, and sand uses II grade of medium coarse sand
And wherein particle diameter in the content of below 0.315mm sand is 20%-25%.
Further preferably, stone is made up of the rubble of 6-25mm continuous particulate gradings, and wherein particle diameter is less than 16mm rubble
Content is 70%-85%, and the clay content of stone is 0.2%-0.6%.
Using above-mentioned technical proposal, due to being provided with substantial amounts of reinforcing bar and pre-buried in section of jurisdiction when section of jurisdiction concreting is vibrated
Part, it is therefore desirable to which fineness modulus and particle size to sandstone are strictly controlled, and by the grain composition of above-mentioned setting, are made
Concrete after must stirring possesses good mobility, ensures have very well after concrete is vibrated in the case of the slump of very little
Workability can fill mould rapidly；Rational grain composition is set also to strengthen the overall continuity of concrete simultaneously,
Reduce the hole between coarse-fine aggregate, reach the effect of enhancing anti-permeability performance.
Further preferably, flyash selects I grade of flyash, and the fineness modulus of flyash is less than 12%, and water ratio is less than
95%, loss on ignition is less than 5%, and strength activity index is more than 70%.
Using above-mentioned technical proposal, flyash can replacing partial cement, so as to reduce cement consumption, reduce concrete into
The heat of hydration after type, the generation in crack is reduced, while can also improve the intensity of concrete, can greatly further strengthened
Degree of scatter between concrete coarse-fine aggregate so that the workability of concrete is further strengthened, and facilitates pouring construction.
The purpose of the present invention two is that providing a kind of water-tight concrete using for duct pieces of shield tunnel prepares section of jurisdiction
Method.
To achieve the above object, the present invention provides following technical scheme：It is a kind of to use for the anti-of duct pieces of shield tunnel
The method that concrete prepares section of jurisdiction is oozed, is comprised the following steps,
S1, by 355-415 part P.O42.5 cement, 953-1212 parts stone, 488-567 parts sand, 35-55 parts flyash, 1.5-3.5
Part methylene dimethyl sodium dinaphthalenesulfonate polymer, 80-100 part water are mixed evenly as stirring thing one；
S2,7-15 parts swelling agent, 3-7 parts pitch, 20-25 part water stirred as stirring thing two；
S3, the Fanglun 1414 of stirring thing one, stirring thing two and 5-9 parts is thoroughly mixed
It is even, turn into stirring thing three；
S4,22-31 parts slag powders, 6-9 parts silica flour, the water of residuals weight number and stirring thing three stirred, made
Obtain section of jurisdiction concrete；
S5, section of jurisdiction concrete are poured using the punching block of energy restricted boundary, and fully vibrated, and 2- is stood after the completion of vibrating
3 hours, and the steam curing before the demoulding by 50 DEG C -55 DEG C, curing time is 5-11 hours.
Using above-mentioned technical proposal, coarse-fine aggregate, admixture, methylene dimethyl sodium dinaphthalenesulfonate polymer and water are made
For the component of stirring thing one so that methylene dimethyl sodium dinaphthalenesulfonate polymer can give full play to it and cement granules are divided
Effect is dissipated, reaches the water consumption for reducing unit volume concrete, and improves the mobility of stirring thing one, is also equipped with shortening concrete
The early strong effect in presetting period；Swelling agent, pitch and water uniform stirring are turned into stirring thing two, then by stirring thing two and stirring thing
One and Fanglun 1414 be thoroughly mixed uniformly, turn into stirring thing three, swelling agent enables to mix
The structure that solidifying soil is internally formed densification reduces porosity raising impermeability, and pitch enables to various components as adhesive meter
Between, it can especially bond even closer between Fanglun 1414 and coarse-fine aggregate, it is mixed to reach raising
The effect of the solidifying overall anti-permeability performance of soil.And the punching block of energy restricted boundary is used pour so that swelling agent is made in inside concrete
Used time, extrusion stress can be formed by expansion, so that inside concrete forms the structure of densification, reduce porosity；Pass through
Steam curing can shorten curing time, can greatly also reduce the internal-external temperature difference that hydration heat of cement is brought temperature strain and
Caused crack.
Further preferably, during steam curing, holding envionmental humidity is 90%-100%.
Using above-mentioned technical proposal, envionmental humidity is kept to be advantageous to prevent concrete surface layer dehydration too fast and produce and split
Seam.
In summary, the invention has the advantages that：The grain composition of suitable coarse-fine aggregate is prepared, the coagulation made
Soil forms good overall continuity, reduces porosity, improves the anti-permeability performance of concrete；The naphthalene sulfonic acids of methylene dimethyl two
Sodium polymer has peptizaiton to cement granules, can improve its workability, unit consumption of water is reduced, so as to reduce concrete reclaimed water
Divide the later stage to evaporate the void content to be formed, reduce porosity, further increase the anti-permeability performance of concrete；And swelling agent pair simultaneously
Concrete shrinkage has compensation function, and the structure of densification can be formed in inside concrete, and the crack resistance for not only improving concrete subtracts
The generation in few crack, it can also reduce the hole of inside；Fanglun 1414 is added in concrete base-material again,
After agitated, form fibre single thread or network structure fully opens, formed in inside concrete a kind of disorderly to support system, energy pole
The plastic shrinkage and sedimentation crackle of the early stage of effective control concrete and cement mortar, greatly improve the impermeability of concrete
Can, then the caused compression in concrete of the dilatant by being generated in swelling agent, further by poly- paraphenylene terephthalamide
P-phenylenediamine fiber compressive is simultaneously filled in the hole of concrete, so as to greatly reduce the porosity of concrete, further
Improve the seepage-resistant grade of concrete.
Embodiment
With reference to embodiment, the present invention will be described in detail.
Embodiment 1：A kind of impervious concrete for prefabricated pipe section for shield tunnel, component and its corresponding parts by weight are such as
Shown in table 1, and it is made as follows：
S1, P.O42.5 cement, stone, sand, methylene dimethyl sodium dinaphthalenesulfonate polymer, 90 parts of water are mixed evenly into
For stirring thing one.Wherein stone is made up of the rubble of 6-25mm continuous gradings, and stone contents of the particle diameter less than 16mm are 75%, stone
Clay content be 0.3%；The clay content of sand is 1.2%, modulus of fineness 2.3-2.8, and sand uses II grade of medium coarse sand and wherein grain
Footpath is 21% in the content of below 0.315mm sand.
S2, by pitch, 25 parts of water, ratio of weight and number 2.5:1.5 anhydrous slufuric acid aluminium and Potassium aluminum sulfate dodecahydrate stirring
Uniformly turn into stirring thing two；
S3, the Fanglun 1414 of stirring thing one, stirring thing two and corresponding weight is thoroughly mixed
Uniformly, stirring thing three is turned into；
S4, the flyash of corresponding parts by weight, slag powders, 10 parts of water and stirring thing three stirred, pipe is made
Piece concrete.Wherein, flyash selects I grade of flyash, and the fineness modulus of flyash is 10%, and water ratio is 90%, loss on ignition
For 3%, strength activity index 80%.
S5, section of jurisdiction concrete are poured using the punching block of energy restricted boundary, and fully vibrated, quiet after the completion of vibrating
Put 2.5 hours, and the steam curing before the demoulding by 50 DEG C -55 DEG C, curing time are 8 hours.
During steam curing, holding envionmental humidity is 90%-100%.
Embodiment 2-6：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Component and its corresponding parts by weight are as shown in table 1.
Component and its corresponding parts by weight in the embodiment 1-4 of table 1.
Embodiment 7：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 is, swollen
Swollen dose is anhydrous slufuric acid aluminium that parts by weight are 7 parts.
Embodiment 8：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 is, swollen
Swollen dose is Potassium aluminum sulfate dodecahydrate that parts by weight are 7 parts.
Embodiment 9：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 is, swollen
Swollen dose by being 2.5 by ratio of weight and the number of copies:2 anhydrous slufuric acid aluminium and Potassium aluminum sulfate dodecahydrate composition.
Embodiment 10：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Swelling agent is by being 3 by ratio of weight and the number of copies:2 anhydrous slufuric acid aluminium and Potassium aluminum sulfate dodecahydrate composition.
Embodiment 11：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Swelling agent is by being 4 by ratio of weight and the number of copies:2 anhydrous slufuric acid aluminium and Potassium aluminum sulfate dodecahydrate composition.
Embodiment 12：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Also include 22 parts of slag powders and 6 parts of silica flours.
Embodiment 13：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Also include 25 parts of slag powders and 7 parts of silica flours.
Embodiment 14：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Also include 28 parts of slag powders and 8 parts of silica flours.
Embodiment 15：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Also include 31 parts of slag powders and 9 parts of silica flours.
Embodiment 16：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Sand clay content is 3%.
Embodiment 17：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Grain fineness number modulus is 3.0.
Embodiment 18：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Grain fineness number modulus is 1.6.
Embodiment 19：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
The grain composition of stone is 26mm-35mm.
Embodiment 20：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
The clay content of stone is 1.2%.
Embodiment 21：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Flyash grade is I grade and fineness modulus is 8%, and water ratio is 85%, loss on ignition 1%, strength activity index 85%.
Embodiment 22：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Flyash grade is II grade and fineness modulus is 15%, and water ratio is 97%, loss on ignition 7%, strength activity index 65%.
Not same-action in order to which the change of each component and its content is played in concrete has the display of contrast
Out, there is provided following 12 group comparative example.
Comparative example 1-4：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Component and its corresponding parts by weight are as shown in table 2.
Component and its corresponding parts by weight in the comparative example 1-4 of table 2.
Comparative example 5-9：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
Component and its corresponding parts by weight are as shown in table 3.
Component and its corresponding parts by weight in the comparative example 5-9 of table 3.
Comparative example 10：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
And grown place identical P.O42.5R cement identical using parts by weight.
Comparative example 11：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
And grown place identical P.O32.5 cement identical using parts by weight.
Comparative example 12：A kind of impervious concrete for prefabricated pipe section for shield tunnel, the difference with embodiment 1 be,
And grown place identical P.O52.2 cement identical using parts by weight.
Trial concrete impermeability test
Test specimen：Embodiment 1-22 is chosen as test specimen 1-22, comparative example 1-12 is as control sample 1-12 for selection, and
To the number consecutively of control group 12 it is 1-34 since embodiment 1.
Test method：The standard concrete test specimen of test specimen 1-22 and control sample 1-12 totally 34 groups of 28d ages is chosen,
Every group takes 6 pieces, after cleaning surface of test piece reaches cleaning, in the encapsulant of one layer of fusing of test specimen side roller coating, and loads impervious
According to standard impermeability test in instrument.During experiment, hydraulic pressure increases 0.025Mpa hydraulic pressure every 2h and recorded at any time since 0.2Mpa
Seep water situation for test block end face, and being added to always in 6 test blocks has 3 test block surfaces to find infiltration, and the water pressure write down now is
The seepage-resistant grade of current test specimen group.
Experimental result：The infiltration grade of 1-34 group samples is as shown in table 4.
Trial concrete crushing strength is tested
Test specimen：Embodiment 1-22 is chosen as test specimen 1-22, comparative example 1-12 is as control sample 1-12 for selection, and
To the number consecutively of control group 12 it is 1-34 since embodiment 1.
Test method：The standard concrete test specimen of test specimen 1-22 and control sample 1-12 totally 34 groups of 28d ages is chosen,
Every group takes 6 pieces, after cleaning surface of test piece reaches cleaning, and every block concrete test specimen is positioned over to the compression Strength testing machine of standard
On, successively apply pressure until surface of test piece it is cracked, record pressure value now, every group is removed a peak and removed again
One minimum, averages as the compression strength of the group.
Result of the test：The sample grade of compressive strength of 1-34 groups is as shown in table 4.
The maximum water pressure of the 1-31 group samples of table 4.
Test data analyzer：This shield tunnel sheet element design grade of compressive strength is C50, seepage-resistant grade P10,
I.e. maximum hydrostatic pressure is 1.000Mpa.Contrast the 1st group-the 22 group of data：
Understand that the 2nd and the 3rd group of match ratio component is more excellent from the contrast of 1-6 groups experimental data, impervious and compression strength compared with
Good, intensity level, gel material content, the ratio of mud meet Bao meter Luo empirical equations；From 7-11 groups and the 1st group of experimental data pair
Than understanding, the ratio of weight and number of anhydrous slufuric acid aluminium and Potassium aluminum sulfate dodecahydrate is 2.5-4 in swelling agent:During 1.5-2, it can meet
Concrete works as 2.5 for impervious and compression strength requirement:Effect is more excellent when 1.5；From 12-15 groups experimental data with
1st group of data comparison understands that slag powders and silica flour improve impervious and compression strength for concrete and have obvious effect；From
16th, 17,18 groups of data are understood with the 1st group of data comparison, the impermeability for concrete and resistance to compression when the clay content of sand is larger
Intensity has harmful effect, and the fineness modulus of sand is excessive more serious to impervious performance impact, and changes on too small anti-permeability performance
Less but the decline of concrete finished product intensity is more；It was found from the 19th, 20 group of data and other group of data comparison, the granular-grade of stone
The anti-permeability performance of concrete is had a strong impact on too conference, and clay content excessively can be also clearly resulted under concrete impermeability
Drop；Pass through the 21st and 22 group and the 1st group of data comparison, the fineness modulus of flyash, water ratio, loss on ignition, intensity activity
Index is for the impermeability of concrete and compression strength has large effect, and grade preferably flyash is advantageous to improve coagulation
The seepage-resistant grade and compression strength of soil.
Data from comparative example 1-12, i.e. 23-34 groups data, across comparison and with the 1st group of data comparison understand,
Methylene dimethyl sodium dinaphthalenesulfonate polymer, Fanglun 1414, swelling agent, pitch are to concrete
Anti-permeability performance has obvious influence；And by the 30th group of data and first group of contrast, lack asphalt component for coagulation
The anti-permeability performance influence of native finished product is smaller, but field test finds that the workability of manufactured finished product concrete is poor, the slump
Larger, mobility is poor, is unfavorable for pumping during construction.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of impervious concrete for prefabricated pipe section for shield tunnel, it is characterised in that include the group of following parts by weight
Point：
P.O42.5 cement 355-415 parts；
Sand 488-567 parts；
Stone 953-1212 parts；
Water 117-138 parts；
Flyash 35-55 parts；
Methylene dimethyl sodium dinaphthalenesulfonate polymer 1.5-3.5 parts；
Fanglun 1414's 5-9 parts；
Swelling agent 7-15 parts；
Pitch 3-7 parts.
2. the impervious concrete according to claim 1 for prefabricated pipe section for shield tunnel, it is characterised in that including such as
The component of lower parts by weight：
P.O42.5 cement 380-400 parts；
Sand 500-520 parts；
Stone 1000-1200 parts；
Water 120-128 parts；
Flyash 40-45 parts；
Methylene dimethyl sodium dinaphthalenesulfonate polymer 2-3.5 parts；
Fanglun 1414's 7-9 parts；
Swelling agent 12-15 parts；
Pitch 3-7 parts；
Swelling agent is at least one of anhydrous slufuric acid aluminium, Potassium aluminum sulfate dodecahydrate.
3. the impervious concrete according to claim 1 for prefabricated pipe section for shield tunnel, it is characterised in that including such as
The component of lower parts by weight：
P.O42.5 cement 380-400 parts；
Sand 500-520 parts；
Stone 1000-1200 parts；
Water 120-128 parts；
Flyash 40-45 parts；
Methylene dimethyl sodium dinaphthalenesulfonate polymer 2-3.5 parts；
Fanglun 1414's 7-9 parts；
Swelling agent 12-15 parts；
Pitch 3-7 parts；
It is by ratio of weight and the number of copies 2.5-4 that swelling agent, which is,:1.5-2 anhydrous slufuric acid aluminium, Potassium aluminum sulfate dodecahydrate.
4. the impervious concrete for prefabricated pipe section for shield tunnel according to claim 1-3 any one, its feature
It is：Also include the slag powders that parts by weight are 22-31 parts；The silica flour of 6-9 parts.
5. the impervious concrete according to claim 1 for prefabricated pipe section for shield tunnel, it is characterised in that：The sand
Clay content be 1.2%-1.5%, modulus of fineness 2.3-2.8, the sand is using II grade of medium coarse sand and wherein particle diameter is in 0.315mm
The content of following sand is 20%-25%.
6. the impervious concrete according to claim 1 for prefabricated pipe section for shield tunnel, it is characterised in that：The stone
It is made up of the rubble of 6-25mm continuous particulate gradings, and stone contents of the particle diameter less than 16mm are 70%-85% in the stone, it is described
The clay content of stone is 0.2%-0.6%.
7. the impervious concrete according to claim 1 for prefabricated pipe section for shield tunnel, it is characterised in that：The powder
Coal ash selects I grade of flyash, and the fineness modulus of the flyash is less than 12%, and water ratio is less than 95%, and loss on ignition is less than 5%, intensity
Activity index is more than 70%.
A kind of 8. method for preparing section of jurisdiction, it is characterised in that using as claimed in claim 1 for the anti-of duct pieces of shield tunnel
Concrete is oozed, is comprised the following steps：
S1, by the P.O42.5 cement of corresponding parts by weight, stone, sand, flyash, methylene dimethyl sodium dinaphthalenesulfonate polymer,
80-100 part water is mixed evenly as stirring thing one；
S2, the swelling agent of corresponding parts by weight, pitch, 20-25 part water stirred as stirring thing two；
S3, the Fanglun 1414 of stirring thing one, stirring thing two, corresponding weight is thoroughly mixed
It is even, turn into stirring thing three；
S4, the slag powders of corresponding parts by weight, silica flour, the water of residuals weight number and stirring thing three stirred,
Section of jurisdiction concrete is made；
S5, the punching block progress section of jurisdiction concreting using energy restricted boundary, and fully vibrated, stand 2- after the completion of vibrating
3 hours, and the steam curing before the demoulding by 50 DEG C -55 DEG C, curing time is 5-11 hours, you can completes to prepare.
9. the method according to claim 8 for preparing section of jurisdiction, it is characterised in that：During the steam curing, environment phase is kept
It is 90%-100% to humidity.
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| CN108529989A (en) * | 2018-06-07 | 2018-09-14 | 北京港创瑞博混凝土有限公司 | Concrete and preparation method thereof for shield duct piece |
| CN108529988A (en) * | 2018-06-07 | 2018-09-14 | 北京港创瑞博混凝土有限公司 | Shield duct piece water-tight concrete and preparation method thereof |
| CN108623266A (en) * | 2018-08-13 | 2018-10-09 | 武汉华强新型建筑材料有限公司 | Recycled concrete and production process thereof |
| CN108975815A (en) * | 2018-08-13 | 2018-12-11 | 武汉华强新型建筑材料有限公司 | Recycled concrete manufacturing process |
| CN109650815A (en) * | 2019-01-21 | 2019-04-19 | 北京通成达水务建设有限公司 | Anti-crack concrete |
| CN109704658A (en) * | 2019-01-28 | 2019-05-03 | 上海城建物资有限公司 | Cutting free concrete |
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| CN107814528A (en) * | 2017-11-08 | 2018-03-20 | 上海市建筑科学研究院 | A kind of forming method of high fine and close low porosity concrete |
| CN108529989A (en) * | 2018-06-07 | 2018-09-14 | 北京港创瑞博混凝土有限公司 | Concrete and preparation method thereof for shield duct piece |
| CN108529988A (en) * | 2018-06-07 | 2018-09-14 | 北京港创瑞博混凝土有限公司 | Shield duct piece water-tight concrete and preparation method thereof |
| CN108623266A (en) * | 2018-08-13 | 2018-10-09 | 武汉华强新型建筑材料有限公司 | Recycled concrete and production process thereof |
| CN108975815A (en) * | 2018-08-13 | 2018-12-11 | 武汉华强新型建筑材料有限公司 | Recycled concrete manufacturing process |
| CN111253117A (en) * | 2018-12-03 | 2020-06-09 | 沈阳市政地铁管片有限公司 | Anti-erosion and anti-corrosion concrete shield segment |
| CN109650815A (en) * | 2019-01-21 | 2019-04-19 | 北京通成达水务建设有限公司 | Anti-crack concrete |
| CN109704658A (en) * | 2019-01-28 | 2019-05-03 | 上海城建物资有限公司 | Cutting free concrete |
| CN109704658B (en) * | 2019-01-28 | 2021-08-17 | 上海城建物资有限公司 | Free-cutting concrete |
| CN109761561A (en) * | 2019-02-27 | 2019-05-17 | 河海大学 | A kind of preparation method and water-tight concrete of water-tight concrete |
| CN111995345A (en) * | 2020-09-01 | 2020-11-27 | 浙江拓邦混凝土有限公司 | Impervious concrete and preparation method thereof |
| CN114276092A (en) * | 2022-01-21 | 2022-04-05 | 光大国信环保科技(北京)有限公司 | Non-autoclaved building material product composition and preparation method and application thereof |
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